Insecticide.



142 and following).

UNITED sTATEs PATENT onmon.

HENRI TlCltRISSE, OF VERNIER, NEAR GENEVA, SWITZERLAND, ASSIGNOR T0 TH E80(lE'llt ANONYME DE LA THYOLEINE, 0F VERNIER, NllAlt (:ENICVA, t\\'l'l"il*lltl..-\f\l).

INSECTICIDE No. 90 1,268. Specification of Letters Patent. Patented Oct.13, 1908.

Application filed August 7, 1906. Serial No. 329,599.

nier, near Geneva,'in the Cantonv of Geneva and the Confederation ofSwitzerland, have invented certain new and. useful Improvements inInsecticides, of which the following is a specification. i

The different hydrocarbons, petroleum, benzin, benzene, light and heavytar-oils and the like, and certain intro-derivatives are used asinsecticide substances (m'cle Hollrung, H andbuch der Chemise/zen Mittel Gegen Pflanzenkmnk/eeitcn, Berlin, 1898, page These substances areefficacious but their use is dangerous. The main disadvantage consistsin their insolubility in water, and 1t is therefore necessary to usesoap for manufacturing suitable mixtures, the soap acting principally asan emulsifying substance. If the emulsion is not perfect as happensoften, parts of the plants are injured, especially the young shoots,which are in contact with the hydrocarbon (petroleum or the like) in itsoily and not emulsified state (wide Larbaltrier, Essais lratz'ques dcUhimz'e H ortz'cole, Paris, 1898, page 114.

Besides hydrocarbons emulsifiedtby means of soap, mixtures of phenols,cresols, naphthols and the like with soap are employed as parasiticidesubstances. These substances exert at least the same action as thosenamed above, but are less dangerous, Without however accomplishingefiicaciously their object. (Vida Larbaltrier, Essais Pratz'gues dcUhimie H ortioole, Paris, 1898, page 118 and following). I Now it hasbeen found that the sulfonic acids and the sulfones' (so called ichthyolsulfonic acids) which are used in therapeutics and which are obtained bythe action'of sulfuric acid upon mineral oils containing chemicallycombined sulfur serve efiicaciously under some circumstances also as aremedy for noxious insects, cryptogamic illnesses of 1 plants etc. Aftera series of experiments made for that object, it has been found, thatthe action of pure i('hthyol-sulfonic acids, is a very slow one andespecially, that the plants are easily injured owing to the too strongconcentrations which are necessary for the destruction of the parasites.But if the ichthyol-sulfonic acids or their salts (sodium,potassiu1nsalt etc.) are mixed in a certain proportion with soda soap orpotash soap, pasty masses are obtained, which diluted with water (best adilution of 1% to 2 '72) do not injure even the most delicate plants butform an excellent remedy for destroying noxious insects, germs etc. Thismixture is made preferably by using the fol- 1 part soap, 1 partichthyol, with 1 part soap, 1.5 part ichthyol, with 1 part soap.Quantities being between these limits can be also employed. The ichthyolmay be in the acid form or in that of a salt of the acid, asichthyolsulfonate of sodium, potassium, ammonium or the like alkalinemetal. These pasty masses can be made for example as follows: 10kilograms ichthyolsulfonic acid, 3 kilograms glycerin, 10 kilogramsblack potash soap are mixed during 30 minutes on the water-bath in ashaking-device until the mass forms a homogeneous paste. This pasty massis completely and in all proportions soluble in water.

If instead of sulfonic acids their salts are used, the mass is made inthe same manner as described 'above.

Having thus fully described my invention I claim:

An insecticide consisting of ten (10) parts of ichthyol sulfonic acid,three (3) parts of glycerin and ten (10) parts of soap.

In testimony whereof I have afiixed my signature in presence of twowitnesses.

HENRI TERRISSE.

Witnesses:

L. H. MUNIER, R. DE Wnnsrnnmnnonn.

lowing proportions: 0.5 part ichthyol, with

